A study by the National Women’s Law Center finds that, in the US, women earn 79 cents for every dollar men make on average, though it varies by state from Washington D.C. (10% gender pay gap) to Louisiana (35% gap). The gap is wider for black and Hispanic women. Some states do more to address pay gap by banning retaliation for workers comparing wages, others make it easier to sue over pay, and California has equal pay for “substantially similar” work.